CIRCLE WITH A DOT

@leeloo that went over my head too.

@leeloo ah! OK, now I've got the opposite question. If they're doing it like this because of the chemistry, how do the ones that don't use 6 AAAA batteries do it? Are they just making 6 flat cells packed into a rectangle instead of cylinders?

@mattdm @kwayk42

@nettings it's packed really tightly in there. The question I have is how it even makes sense economically to do that.

@astrid @kwayk42

@mattdm I'm not sure what I was supposed to be seeing in that article. Would it make more sense if I had a subscription to read the full article?

@kwayk42

@nettings I've taken one apart and I've seen it myself.

Inside a 9-Volt Battery

Here is what you will find inside a standard 9V battery... 6 AAAA wired in series!

(www.rfcafe.com)

@astrid @kwayk42

@mattdm yeah that brings up so many questions. So few things use AAAA batteries that most people don't even know they exist.

On the other hand, 9V batteries aren't at all uncommon yet manufacturers will often make 6 AAAA batteries first and then use those to make a single 9V? Wouldn't it be more efficient to make the 9V directly and make fewer AAAA's?

This has been bugging me ever since I learned this.

@kwayk42

@jalager OK, I had no idea the single A battery was a thing.

Also, it's really funny that this battery is apparently so uncommon that they didn't have an actual photo to use on the Wikipedia page for battery sizes so they just drew a 2D representation of it on a piece of graph paper.

List of battery sizes - Wikipedia

(en.wikipedia.org)

@kwayk42 @astrid

@astrid is there any easy way to tell which ones are or aren't without ripping apart a 9V battery?

I actually didn't even know AAAA batteries existed before I learned about this. I found an old 9V and tore into it as soon as I read about it and that one was indeed made from 6 AAAA batteries.

@kwayk42

@kwayk42 that little factoid about 9V batteries (usually) being nothing more than six AAAA batteries in a trench coat will never not be mind blowing to me.

@astrid